The remains of the ruins can be visited
CastleGreenhead
Thirlwall Castle

Near the village of Greenhead in Northumberland, England, lies Thirlwall Castle, the ruin of a fortress. Its uniqueness lies in its construction, as it was built in the 12th century from stones taken from the nearby Hadrian's Wall.
History+
The origins of Thirlwall Castle date back to the 12th century, when the castle was constructed from the stone material of the Roman Hadrian's Wall. In 1330, the complex was expanded by John Thirlwall. Later, in 1542, Robert Thirlwall was the owner of the castle.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: Ozymandias
This description draws on the facts documented in the linked Wikipedia article; Wikipedia content is licensed under CC BY-SA 4.0. Wording and editing: Mobile History.
Location: 54.9888, -2.5338